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#19
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![]() As the owner of a 2.5 - I can tell you it sure can't hurt to have one. I know the heater on my nano comes on semi regularly at night. I'm assuming your tank wont be lit 24/7
![]() I always prefer a heater that I don't need over one I don't have. BTW 20g's coming along nicely - she's up and running as we speak; hopefully the 175w MH for it arrives early in january. Andy |